markpwhit

thanks too all. wanted to make sure to avoid learning the hard way.

looking for some input on the correct way to charge a 12 volt battery that is used in a positive ground system. do you charge it like a standard battery? - or do you hook the charging cables negative to positive and positive negative? getting mixed answers and need to clarify

thanks for any input

I have had the same experience in the past. Thought my existing alternator was shot but took it to a local shop (Buckeye Electric-Painesville Ohio) who were more then helpful in checking things out. In the end they tested it for me and it ended up being okay. Saved me a ton of time, money, and frustration.

buckeyeautoelectric.com

Hope this helps

to all;

thanks for all the great information.

looking for some tips on how to hook up a cb radio on a b model positive ground system

any help would be appreciated

looking for some advice where i can purchase a water pump for a 56 b42 with a 401 gas engine.

thanks in advance for any leads.

Definately cool. Can never go wrong having a wrecker on hand to assist other unitsunits Rudi

looking for any leads where i can purchase a water pump for 1956 b42 with 401 gas motor.

any help would be appreciated.

A single wire alternator needs to turn about 1000 rpms to "cut in"...that is alternator RPM, not engine idle speed! On my B model, I have to rev the engine to get the alternator to cut in, then it charges (at a reduced rate) at all rpms...

Thanks for the feedback. It is a single wire - what kind of engine RPM do you run yours too kick it in?

Also - is your B model a positive ground system?

If it has a gen. on it you'll have to rev it a tad to get her charging.

Thanks for the reply. It is definately a alternator with no generator. Will keep probing.

Thanks again

Looking for some help. I have heard in the past that the alternator will not kick in until the truck is run at a higher rpm for an extended amount of time. I had it tested and it came back okay. Put new battery in it and ran it at idle for a extended amount of time and the battery went dead.

Will the alternator charge the battery at a idle speed.............and the truck came as a positive ground system.

Any help would be appreciated.

was talkin about the Ny/Nj tunnel rescue B model Dennis Meehan had for sale a few years ago

was talkin about the Ny/Nj tunnel rescue B model Dennis Meehan had for sale a few years ago

Yes the unit was purchased from Dennis. Picked it up this past September. B62sx with a diesel 673 - was Triboro bridge/tunnel unit.

that short wheelbase wrecker was the one you got from Dennis and imported right? was an ex ny/nj tunnel rescue truck? if so it was about an hour from me until you bought it. thats the one your workin on??? odd to see a B model with the old style L model spring hangers

Are you referring to the one with dual winches? If so i picked it up and it is now located in Ohio and is scheduled for restoration. lots of power and winches work very well.

I'd find a shop to rebuild the one you have. I know of a local guy to me who specializes in such things. I can get contact information if you need it. I'd guess you can dig around the yellow pages or the net and find one local.

Good luck

Looking for some help. I recently acquired a 56 Mack B42 and have found out that the alternator has failed. I have done extensive research to see what would be the correct alternator to replace with as I cannot see any part numbers on it. I have been informed that it is a 12-volt 100 amp and only has a single wire from the battery.

Can anybody recommend what brand and part number would be suitable for replacement. As far as I can tell - Delco offers one but not sure which one is correct.

Thanks

The split rims are going to be 20 or 22 inch...hard to find tires for...the newer one piece wheels are 22.5 and 24.5...

Hard to know what was on it originally as you could order either size. You cannot change the rim/tire with out changing the wheel, unless they are budd type solid steel or aluminum.

i assume you mean 2 or 3 piece rims. split rims are from the old days and are actually where the whole rim splits in half right down the middle and is really dangerous of not chained and locked right. the two and three piece are still available but 22'' tires are about extinct. you can switch right over to 11 24.5's and put them right on your 22'' hubs or 11 22.5's if you have 20'' hubs. should bolt right up and use the same spacer and wedges. the spacer should be the normal 3 5/8 wide spacer unless you run wider 12.00 tires then you would need a 4'' spacer and shorter wedges. either way, make sure the wedges ''bottom out'' on the spoke and there isnt a gap. usually a telltale sign you have the wrong spacer or wedges is the wedges wont bottom out on the spoke or the tires are too close together.

Maddog.................is it fair to assume can purchase solid one piece rims and they should bolt on per your comments above?

thanks

most B62's had 1100 22's or 10.00 22's on them originally. never seen any with 10.00 20's on them, im sure they made them tho but in our upstate ny area in the 50's most of the old timers liked big rubber.you can change over to 1100 24.5 or 12.00 24.5 and run radials cause 10.00 22's are about impossible to find just remember to use the right spacer and new rims. most guys will put wider tires on and use same spacer and the tires are too close when loaded. have also seen guys run 4'' spacers on a Mack and nost use the shorter wheel wedges and they dont tighten right. most Macks i have seen run a 3 5/8 spacers. C and E trucking was an oddball tho, they ran all 9.00 20's on their B 61's and B63's or B sickley ones as most of the drivers called them cause they were beat in the ground. the reason for the 9.00's, no one would steal them....

Another quick question...........is it fair to assume that i can change from a split rim to a solid wheel.........and if so how difficult is it/is are there any additional modifications etc required?

thanks

was wondering if anybody could help me out. new to the game and i am trying to confirm the correct tire and rim size for a 1956 b62. currently has tires on unit but they are all different sizes. tandems in back. eventually would like to purchase newer steel rims as i believe the current ones are split rims (rear)

thanks

mark